Furnace door or closure.



J. B. PHILLIPS & J. A. KAPLAN.

Patented May 19, 1914.

WITNESSES /z4@m%% ATTORNEYS 1:: ran STATES PATENT Fi l JOSEPH B. PHILLIPS AND JOSEPH A. KAPLAN, OF ZANESVILLE, OHIO.

FURNACE DOOR OR- CLOSURE.

To all whom it may concern Be it known that we, Josurn B. PHILLIPS and Josnrrr A. KAPLAN, citizens of the United States, and residents of Zanesville, in the county of hiluskingum and State of ()hio, have invented a new and Improved Furnace Door or Closure, of which the following is a full, clear, and exact description.

This invention relates to the doors or closures of smelting furnaces where exceedingly high heat is generated.

. The doors now used very extensively, comprise an iron shell hollowed out at the inside and filled with a facing of built-up fire bricks. The bricks are supported mainly on a bottom flange or transverse member which frequently burns out in two days use, and very rarely lasts more than ten days, notwithstanding that in many cases the metallic bottom portion referred to is provided with passage for the circulation of water.

A door formed in accordance with our invention presents to the furnace opening an all-refractory closure, preferably consisting of a unitary slab of the nature of fire-brick, in connection with which a novel holder is employed, constituting a gripping and suspending means for the refractory closure.

The holder is constructed to sustain and carry the refractory closure proper by engagement therewith at points other than at the bottom, so that the door presents an allrefractory suspended bottom end, the metallic lower end of the door now commonly employed being eliminated. The holder and the refractory closure are so formed as to interengagc each other, and the engaging members of the metallic holder are protected by the refractory material.

()ur invention results in very materially n-otracting the life of the door, as a whole, and the refractory slab thereof may be readily renewed and replaced in the holder by a minimum expenditure of time and labor and at a trifling cost.

In the preferred arrangement which is given as an illustrated example of our invention, the construction of the holder is such that when the door is swung on a clevis, hook, or any other expedient in mechanipulating it to close or open the furnace, the holder acts as a clamp, its members being under clevis control and acting as tongs so that the weight of the refractory closure tends to maintain it in the holder.

lhe invention will be specifically de- Specification of Letters Patent.

Application filed November 10, 1911.

Patented May 19, 1914.

SeriaI No. 659,526.

scribed hereinafter in connection with the mentioned illustrated example.

Reference is to be had to the accompany ing drawings fol-min a part of this specification, in which similar characters of ref crence indicate corresponding parts in all the figures.

Figure 1 is a face View with parts broken out of a door constructed in accordance with our invention; Fig. 2 is a top view thereof; Fig. 3 is a horizontal section on the line 33 of Fig. 1; Fig. 4 is a perspective view of one of the two like gripping members that constitute the holder; and l ig. 5 is a perspective view of a unitary slab of firebrick or similar refractory material constituting the door or closure proper.

The refractory closure 10 is preferably a unitary slab, as shown, and of general rectangular shape; and the holder for the slab consists of a, frame for the top and side edges of the slab, and in the form shown the holder or frame comprises two like l shaped sections 11 consisting of top members and depending side arms, as shown, the top members having reduced meeting ends 12 that overlap, and each being provided with. a hole 13, which holes register when the sections 11 are assembled as in Figs. 1 and E3, and thereby receive the usual clevis or any suspending hook or other expedient for mechanipulating the door in closing and opening the furnace.

The illustrated means of sustaining the refractory body or closure proper in the frame consists of inwardly projecting lugs 14 on the depending arms of the frame, said lugs being received in corresponding recesses 15 formed in the vertical side edges of said closure, and advantageously we form two recesses in each side e ge, the upper recesses being spaced the same distance from the top edge as the lower recesses are spaced from the bottom edge, so that both side edges are alike, and the slab may thus be turned either end up and be accommodated in the holder frame, which has its lugs 14 similarly located. The recesses 15 in the slab are within the planes of the slab, and thereby the gripping lugs 14 are covered by the refractory material and protected from the heat.

The making of the clamp members 1.1 alike is advantageous in that but one pattern is necessary, and the members are more rea dily assembled, the right and left members not differing from each other, and the door as a whole is reversible, the front and back being alike so that either side may be presented to the furnace opening. In practice, when the slab and the frame members are assembled, and preparatory to swinging the door into place, the frame members 11 are bolted together, the overlapping ends 12 being for this purpose provided with boltholes 16 to receive bolts 17. hen the door is swung on the clevis or like device, the bolts 17 are removed so that the weight of the parts gives clevis control; beside the frame members 11 act as tongs to better grip the slab. Furthermore it ill be observed that the relative thickness of the refractory body and the frame are such that the said body or closure proper projects at both faces beyond the frame.

Having thus described our invention, we claim as new, and desire to secure by Let ters Patent:

1. A furnace door or closure comprising a holder, and a slab of refractory material removably carried by the holder and formed with side recesses, the said holder consisting of corresponding top members detachably united and having means permitting them to be swung together from an overhead sup port, and depending side members having inwardly projecting gripping lu 's corre sponding with the recesses of the slab, the said slab presenting a suspended all-refractory bottom portion.

2. A furnace door or closure comprising a holder and a unitary slab of refractory material and formed in each side edge with recesses spaced an equal distance apart, said holder consisting of corresponding top members having overlapping meeting ends formed with registering openings, and depending side members each having a plurality of inwardly-projecting gripping lugs spaced to correspond with the recesses of the slab, the said members terminating short of the bottom of the door, and the slab presenting a suspended, all-refractory bottom portion.

3. A closure for furnaces, comprising a refractory body, and a separate holder COIH- prising pivoted gripping side members serving to tong the said body, and having interengagement therewith.

i. A furnace door or closure comprising a unitary refractory slab, and a sectional holder removably sustaining the slab and consisting of top members and side gripping members mounted to swing relatively to the slab, the sections of the holder having means whereby they may be coupled by and engaged with suitable suspending means.

5. A furnace door or closure formed of a body of refractory material, and a holder removably connected with the said body and having laterally movable members in interengagement therewith.

(5. A furnace door or closure composed of refractory material, and a suspension holder in the form of a frame having laterally movable side members detachably supporting said material and terminating short of the bottom thereof, the said refractory material constituting the bottom edge of the door.

7. The herein described furnace door or closure comprising a frame consisting of top and side members, and a ref 'actory bodv removably held by said frame, the said side members of the frame terminating at their lower ends short of the bottom edge of the refractory body and having lateral projections in interengagement with the slab at the sides.

In testimony whereof we have signed our names to this specification in the presence 01 two subscribing witnesses.

JOSEPH B. PHILLIPS. JOSEPH A. KAPLAN lVitnesses Snwaun R. VFELLER, Manon D. THOMPSON.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of latents. Washington, D. (lit 

